JP2002070451A - Blind apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blind apparatus which can instantaneously assume an open position in an emergency, and allows slats thereof to be lifted in a very smooth manner without requiring a very large force. SOLUTION: The blind apparatus 1 is comprised of a blind 5, expandable linking mechanisms 7, a tilting mechanism 10, and a link lifting mechanism 9. The blind 5 includes a pair of jambs 2 and 3 and the plurality of slats 4 which each horizontally extend and are arranged in parallel with each other in the vertical direction. The linking mechanisms 7 support longitudinal edges 6 of the respective slats 4, and they are arranged in the jambs 2 and 3. The tilting mechanism 10 is connected to the linking mechanisms 7 so as to tilt the slats 4 via the linking mechanisms 7. The link lifting mechanism 9 lifts upper ends of the linking mechanisms 7 having their lower ends connected to the jambs 2 and 3 via terminal mechanisms 8, via the tilting mechanism 10, to thereby control the blind 5 so as to assume a closing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blind device which is disposed on a window of a building and, if necessary, blindfolds the window and the like.

[0002]

In this type of blind device, usually, a blind composed of a plurality of slats juxtaposed in the vertical direction is arranged above, and the blind is lowered from above by the operation of a lifting device. It is configured such that an opening such as a window is blindfolded, and the blind is raised by the reverse operation of the lifting device to open the opening.

[0003] In such a blind device, as described above, when the opening is opened, a plurality of slats constituting the blind are arranged above the opening, usually in a state of being closely overlapped with each other. Even when the opening is fully opened, the opening is partially closed by the polymerized slats, and when the opening is fully opened, a sufficient release feeling cannot be enjoyed, which is annoying. Even if the slat housing frame is provided above in order to eliminate this, an occupied space for the slat housing frame is required above, and this may be difficult in a general house or the like, and is not always satisfactory. In addition, for example, when it is desired to perform blindfolding only under the opening, there is a problem that the conventional blind device cannot perform such a blinding operation.Furthermore, slats must be cleaned using a ladder, a table, or the like. There is also a risk that an object or a person will be pinched by the lowering of the blind in the closing operation.

Therefore, a blind device as disclosed in Japanese Patent Application Laid-Open No. Hei 8-210049 has been proposed. According to the proposed blind device, the above-mentioned various problems can be solved preferably, and the point can be satisfied. However, in the blind device as long as described in the gazette, it is difficult to immediately bring it to an open state in an emergency or the like, and when it is urgently required to escape outside in a closed state of the opening, a slat or the like is used. Need to be destroyed.

[0005] Further, since the operation of this type of blind device, particularly the opening and closing operation of a blind device installed in a window of an apartment house or a detached house, is usually performed manually, it is difficult to raise the slats to bring the opening state. It is preferable that it does not require much force and can be performed extremely smoothly,
The proposed blind device is still not satisfactory for these.

[0006] Further, the blind device is usually provided with a tilt mechanism for tilting each of the slats to completely close the opening (completely closed state) and close the opening (half-blind state). However, the operation of the tilt mechanism depends on the weights of the slats and the link members, and when the weights of the slats and the link members are small, the slats are kept horizontal in the transition to the opening position of the blind. There is a possibility that inconvenience may not be caused. Such inconvenience is considered to be caused by the frictional resistance in each shaft portion.To solve this inconvenience, reducing the frictional resistance in the shaft portion using a ball bearing or the like is costly and costly. It is not always satisfactory.

[0007] The present invention has been made in view of the above-mentioned points, and an object thereof is disclosed in JP-A-8-210.
Utilizing the advantages of the blind device as described in Japanese Patent Application Publication No. 049, it is possible to immediately bring the device to an open state in an emergency, without requiring much force for raising the slat. An object of the present invention is to provide a blind device that can be performed extremely smoothly.

Another object of the present invention is to provide a blind device capable of making the transition of the slat to the horizontal state at low cost and with high reliability.

[0009]

According to a first aspect of the present invention, there is provided a blind apparatus comprising: a plurality of slats vertically arranged between a pair of vertical frames; A free link mechanism and a link lifting mechanism that lifts the upper end of the link mechanism whose lower end is connected to the vertical frame and arranges the blind in the closed position, wherein the link lifting mechanism has one end A flexible elongate body whose section is connected to the upper end of the link mechanism, and a rotatable body to which the other end of the elongate body is connected and which winds and elongates the elongate body by rotation; A rotary drive for rotating the body, the rotary drive having a string, a pulley around which the string is wound, and an output shaft on both sides of the pulley. , Deceleration planetary teeth that reduce the rotation of the pulley and output it to each output shaft The device is connected to each output shaft of the reduction planetary gear device, and the rotating shaft to which the rotating body is fixed and the pulley string in the winding direction of the elongated body are allowed to rotate by manual pulling down. A ratchet mechanism for releasably prohibiting rotation of the pulley blind by its own weight in the extension direction of the elongated body, and prohibiting rotation of the pulley in the extension direction of the elongated body by the ratchet mechanism. Can be canceled by

According to the blind device of the first aspect, since the rotary drive device is provided with the reduction planetary gear device,
The lifting of the slat does not require much force and can be performed extremely smoothly, and the ratchet mechanism can release the prohibition of rotation of the pulley in the direction of extension of the long body by the string-like body. Therefore, in an emergency, it can be immediately brought to the open state.

The reduction planetary gear device may be either a star type or a planetary type. In a preferred example, the reduction planetary gear device is fixed to each side of the pulley like the blind device according to the second aspect of the present invention. A sun gear, a planetary gear group consisting of planetary gears meshed with the sun gear, and an internal gear meshed with each of the planetary gears of the planetary gear group, wherein the output shaft Are fixed to a planetary frame that rotatably supports the planetary gears of each planetary gear group.

In a preferred embodiment, the ratchet mechanism preferably has a ratchet gear fixed to the side surface of the pulley and a pawl that meshes with the ratchet gear, as in the blind device according to the third aspect of the present invention. A lever member, and a biasing member that resiliently biases the lever member so that the pawl meshes with the ratchet gear. The lever member engages the pawl with the ratchet gear by lifting the cord-like body. Is rotated in the direction in which the is released.

[0013] According to such a ratchet mechanism, the rotation prohibition of the pulley can be released only by rotating the lever member elastically urged by the urging member by lifting the string-like body. Can be brought into an open state.

In a preferred example, as in the blind device according to the fourth aspect of the present invention, the rotary drive device includes a housing for housing the pulley, and the lever member is rotatably supported by the housing. The biasing member includes a leaf spring having one end fixed to the housing and the other end in contact with the lever member, and the lever member has a blind according to the fifth aspect of the present invention. Like a device, it has a guide recess for guiding the hanging of the cord.

When the lever member and the urging member are configured as in the blind device according to the fourth aspect, the rotary drive device can be formed extremely compact. When the member has the guide recess, the rotation prohibition of the pulley can be released without error by lifting the string.

The string-like body may be endless or endless, and may be either a metal or synthetic resin chain or a toothed belt. However, as in the blind device according to the sixth aspect of the present invention, In addition, it is preferable to use an endless ball chain.

A blind device according to a seventh aspect of the present invention comprises:
The blind device according to any one of the above aspects, further includes a tilt mechanism for tilting each of the slats, wherein the upper end of the link mechanism is lifted by the link lifting mechanism via the tilt mechanism. ing.

According to the blind device of the seventh aspect, the slats are tilted by the tilt mechanism, and the opening can be completely closed and the opening can be selectively closed.

In a blind device according to an eighth aspect of the present invention, in the blind device according to the seventh aspect, the link mechanism includes a first vertical link row and a second vertical link row. A second vertical link row, and a plurality of horizontal link members rotatably connected to the first and second vertical link rows, and an end of each slat is provided with a corresponding one of the corresponding horizontal link members. The tilt mechanism is guided by the vertical frame so as to be able to move linearly, and the rotation is regulated by the vertical frame. On the one hand, the uppermost horizontal link member is rotatable, and on the other hand, The link lifting mechanism is connected to a linearly movable member, and one end is connected to the linearly movable member, and the other end is connected to the uppermost horizontal link member. An elastic member that provides a turning force in one direction and a top horizontal phosphorus Upon increase of the member, and an opposite force rotating mechanism for forcibly rotating the transverse link member of the topmost against elastic one direction rotating force of the elastic member in the opposite direction.

According to the blind device of the eighth aspect, since the uppermost horizontal link member is provided with the elastic member for applying the elastic one-direction turning force, the uppermost horizontal link member is driven by the reverse forced rotation mechanism. After the horizontal link member is forcibly rotated in the opposite direction, in order to shift the blind again to the opening position,
When lowering the uppermost horizontal link member, the uppermost horizontal link member can be forcibly rotated in one direction by the elastic rotating force of the elastic member, and as a result, the slats shift to the horizontal state. Can be performed at low cost and with high reliability.

In the blind device of the present invention, the lower end of the link mechanism may be elastically pulled by an elastic end mechanism, and the lower end of the link mechanism is elastically lowered by the end mechanism. By pulling, the slat can be given a downward force in addition to its own weight,
The normal opening and the emergency opening can be performed more reliably and promptly.In addition, even when the link lifting mechanism is excessively operated when disposing the blind at the opening position, the link mechanism may slightly rise. As a result, damage to the link mechanism can be prevented.

In the present invention, a belt, a wire rope, a chain, a string, or the like can be preferably used as a flexible elongate body. When a wire rope or a string is used, a pulley around which these are wound and engaged is preferably used, and when a chain is used as a long body, a sprocket wheel which meshes and engages with the chain is preferably used. Can be

Next, the present invention will be described in more detail with reference to preferred embodiments shown in the drawings. The present invention is not limited to these examples.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 to 8, a blind device 1 of the present embodiment includes a blind 5 composed of a plurality of slats 4 which are vertically arranged between a pair of vertical frames 2 and 3; And a flexible link mechanism 7 (the vertical frame 3 side is not shown, the same applies hereinafter) arranged in the vertical frames 2 and 3, and a link mechanism 7. To tilt each of the slats 4 through
The lower end is connected to a tilt mechanism 10 (the vertical frame 3 side is not shown, the same applies hereinafter) connected to the link mechanism 7 and a vertical frame is provided via a terminal mechanism 8 (the vertical frame 3 side is not shown, the same applies hereinafter). 2 and 3
And a link lifting mechanism 9 for lifting the upper end of the link mechanism 7 connected to each of the above through the tilt mechanism 10 and disposing the blind 5 at the closing position.

The vertical frame 3 and the link mechanism, the terminal mechanism and the tilt mechanism on the vertical frame 3 side are the same as the vertical frame 2 and the link mechanism 7, the terminal mechanism 8 and the tilt mechanism 10 on the vertical frame 2 side, respectively. Therefore, the vertical frame 2 will be mainly described below, and the vertical frame 3 will be described as necessary.

The vertical frame 2 and the vertical frame 3 are bridged by the upper frame 15 and are opened and closed by the blind 5.
6 are formed. The vertical frame 2 has a slit 17 extending vertically.

Each of the slats 4 has a large gutter-like portion 21 exposed to the outside when the opening 16 is closed,
6 has a small gutter-like portion 22 that is superimposed on the lower end side of the upper gutter-like portion 21 when the upper gutter portion 2 is closed.
A seal member 23 is fitted to the lower end of the first member 1.

The link mechanism 7 includes a plurality of vertical link members 25.
Are linked in series to each other via a shaft pin 26 so as to be freely rotatable, and, like the vertical link row 27, a plurality of vertical link members 28 are rotatably connected to each other via a shaft pin 29. A vertical link row 30 connected in series and arranged in parallel with the vertical link row 27;
A horizontal link row 32 composed of a plurality of horizontal link members 31 rotatably connected to a vertical link row 27 via a shaft pin 29 at every other end via an axial pin 29.
And each end 6 of the slat 4 is
It is fixedly connected to the horizontal link member 31 by a fixture 33 passing through the slit 17. In order to define the folding direction of the vertical link rows 27 and 30, the vertical link members 25
And 28 are provided with a blocking piece 34 integrally therewith.

The end mechanism 8 includes a link member 41 rotatably connected at one end to the lowermost horizontal link member 31 of the horizontal link row 32 via a shaft pin (not shown), and a link member 41 at one end. A link member 43 rotatably connected to the other end of the vertical frame 2 via a shaft pin 42; and a link member 43 rotatably connected to the other end of the link member 43 via a shaft pin 44.
And a base member 46 fixed to a bottom wall 45 of the first link mechanism. The lower end of the link mechanism 7 is connected to the vertical frame 2 via the terminal mechanism 8.

The link member 41 or 4 in the terminal mechanism 8
3 is constituted by an extendable coil spring or the like so that the lower end of the link mechanism 7 can be slightly displaced up and down by the coil spring or the like, and when the link mechanism 7 is extended, the entire link mechanism 7 is formed. Alternatively, it may be elastically pulled downward.

The link lifting mechanism 9 has a shaft 51 attached to the upper frame 15.
A turning roller 52 rotatably supported via a rotary shaft, a pulley 54 also as a rotating body rotatably supported on the upper frame 15 via a rotary shaft 53, and a turning roller which is wound around and engaged with the pulley 54. A rotation drive device for rotating a pulley 54, a metal belt 56 as a flexible elongate body, which is wound around a roller 52 and whose delivery end is connected to a plate-shaped main body 55 of the linearly movable member 50. 57.

The link lifting mechanism 9 also includes a turning roller, a pulley, and a metal belt similar to the turning roller 52, the pulley 54, and the metal belt 56 on the vertical frame 2 side on the vertical frame 3 side. ing.

The rotation driving device 57 includes a housing 61,
It has a pulley 63 around which an endless ball chain 62 as a cord-like body is wound, and output shafts 66 and 67 on both sides 64 and 65 of the pulley 63. The reduction planetary gear units 68 and 69 that output to the output shafts 66 and 67 are connected to the output shafts 66 and 67 of the reduction planetary gear units 68 and 69, and the pulley 5
4 (the pulleys on the side of the vertical frame 3 are not shown), and the rotation of the pulley 63 in the winding direction of the belt 56 (the rotation in the R1 direction) is allowed. And a ratchet mechanism 71 for releasably prohibiting rotation of the pulley 63 in the feeding direction (rotation in the R2 direction).

The housing 61 in which the halves 72 and 73 are fixed to each other with screws or the like is composed of a housing body 74 rotatably housing the pulley 63 and a housing body 7.
4, and a guide portion (not shown) such that one hanging portion 81 of the ball chain 62 hangs side by side in close proximity to the other hanging portion 82, Each of the mounting bodies 75 and 76 has an engaging portion 77 and 78, and the engaging portions 77 and 7
8 respectively engage with the ridges 79 and the concave ridges 80 formed integrally with the upper frame 15 to suspend and fix the housing 61 including the housing body 74 to the upper frame 15.

Each of the reduction planetary gear units 68 and 69 includes:
The reduction planetary gears 68 are constructed in the same manner as each other.
Is a sun gear 86 fixed to the side surface 64 of the pulley 63 via a ratchet gear 85, a planetary gear group 89 including three planetary gears 87 meshed with the sun gear 86, and each planetary gear 87 is rotatable. And the housing body 7
A planetary frame 90 rotatably disposed in the planetary gear group 4 and a planetary gear group 8
And an internal gear 91 having teeth (corresponding to the teeth 98) meshed with the planet gears 87 of No. 9 on the inner peripheral surface. The output shaft 66 is fixed to the planetary frame 90, and the internal teeth The gear 91 is fixed to the housing body 74 by a screw or the like, and the reduction planetary gear device 69 is connected to a sun gear (corresponding to the sun gear 86) fixed to the side surface 65 of the pulley 63 via a ratchet gear (corresponding to the ratchet gear 85). A planetary gear group 96 composed of three planetary gears 95 meshed with the sun gear;
Each planetary gear 95 is rotatably supported, and has a planetary frame 97 rotatably arranged in the housing body 74 and teeth 98 meshed with the planetary gears 95 of the planetary gear group 96 on the inner peripheral surface. An internal gear 99, and the output shaft 67
Is fixed to the planet frame 97, and the internal gear 99 is fixed to the housing body 74 by screws or the like.

A rotating shaft 70 is connected and fixed to the output shaft 66 protruding from the central through hole 105 of the internal gear 91, and the output shaft 67 protruding from the central through hole 106 of the internal gear 99 is The rotating shaft 53 is connected and fixed.

According to the rotary driving device 57, the ball chain 6
By manually pulling down one of the hanging portions 81 of the pair 2 and rotating the pulley 63 in the R1 direction, the rotating shafts 70 and 53 can be rotated at a reduced speed via the output shafts 66 and 67. By the rotation of the rotation shafts 70 and 53, the pulley 54 (the pulley on the side of the vertical frame 3) can be rotated in the winding direction of the belt 56.

The ratchet mechanism 71 is connected to the side surface 6 of the pulley 63.
A ratchet gear 85 (including a ratchet gear on the side surface 65) fixed to the ratchet gears 4 and 65;
A rotatable lever member 112 integrally having a claw 111 that meshes with the housing 5, an end portion 113 is fixed to the housing body 74 by a screw or the like, and the claw 111 is elastically engaged with the ratchet gear 85. An L-shaped leaf spring 114 is provided as an urging member for urging the lever member 112 to rotate.

The lever member 112 has a guide recess 115 (see FIG. 13) for guiding the hanging portion 82 of the ball chain 62 and a recess 1 in which the other end 116 of the leaf spring 114 is disposed.
17 and is rotatably supported by the housing main body 74 via a pin 118.
As shown in FIG. 4, when the hanging portion 82 of the ball chain 62 is lifted, the pawl 111 is rotated in a direction in which the engagement with the ratchet gear 85 is released. The leaf spring 114 is in elastic contact with the lever member 112 at the other end 116.

The ratchet mechanism 71 includes a lever member 112.
When the hook 111 is elastically pressed by the leaf spring 114 and the pawl 111 meshes with the ratchet gear 85, the rotation of the pulley 63 in the winding direction of the belt 56 (the rotation in the R1 direction) is allowed, and the belt 56 is extended. While the rotation of the pulley 63 in the direction (rotation in the direction R2) is prohibited, the lifting of the hanging portion 82 of the ball chain 62 causes the lever member 112 to rotate against the elastic force of the leaf spring 114, thereby causing the ratchet gear of the pawl 111 to rotate. When the engagement with the gear 85 is released, the rotation prohibition of the pulley 63 in the R2 direction is released so that the pulley 63 can freely rotate in the R2 direction. Thus, in the blind device 1 of the present embodiment, the prohibition of the rotation of the pulley 63 in the feeding direction of the belt 56 by the ratchet mechanism 71 can be released by lifting the ball chain 62. When the blind 5 fully or partially closes the opening 16, the pulley 63 is closed.
Is allowed to rotate freely in the R2 direction, the blind 5
As a result, the pulley 54 is rotated, the belt 56 is fed out, the slat 4 closing the opening 16 is lowered, and the blind 5 is opened. Placed in position
The completely closed or semi-closed opening 16 is released by the blind 5.

When the side-by-side window glass doors 151 are closed, the ball chain 62 is lifted by the window glass doors 151 and the lever member 11 is lifted by this lifting.
It is preferable that the rotation of the second motor cannot be performed.

The link lifting mechanism 9 rotates the pulley 54 in the winding direction of the belt 56 by pulling down the hanging portion 81 of the ball chain 62, whereby the upper end of the link mechanism 7 is moved via the tilt mechanism 10. The lifting and blind 5 are arranged at the closed position.

The tilt mechanism 10 is guided by the vertical frame 2 so as to be freely movable, that is, vertically movable, and the rotation in the R3 direction about the axis 131 is regulated by the vertical frame 2, and On the one hand, the uppermost horizontal link member 132 of the horizontal link members 31 is rotatable in the directions R3 and R4 about the axis 131, and on the other hand, the above-described linear motion in which the link lifting mechanism 9 is connected respectively. The flexible member 50 and the mounting member 133 mounted on the uppermost horizontal link member 132
And one end 134 is connected to the above-described main body 55 of the linearly movable member 50.
The other end 135 is connected to the uppermost horizontal link member 132 via a mounting member 133, and serves as an elastic member that applies an elastic turning force in one direction R3 to the uppermost horizontal link member 132. Of the coil spring 136 and the uppermost horizontal link member 132 against the resilient turning force of the coil spring 136 in one direction R3 when ascending above the opening 16 of the uppermost horizontal link member 132. A reverse forcible rotation mechanism 137 for forcibly rotating in the opposite direction R4.

The linearly movable member 50 includes a plate-shaped main body 55,
Collar 14 integrally provided on main body 55 side by side in the vertical direction
And two projections 138 with zero, and a feeding end of the belt 56 is fixed to an upper end of the main body 55.
The lower end of the main body 55 has a shaft member 139 that allows the horizontal link member 132 and the mounting member 133 to have an R centered on the shaft 131.
Are relatively rotatably connected in directions 3 and R4,
Thus, the main body 55 is configured such that the uppermost horizontal link member 132 is rotatable in the R3 and R4 directions on the one hand, and the link lifting mechanism 9 is connected on the other hand. The shaft member 1 is attached to the uppermost horizontal link member 132.
The protrusions 138 are vertically slidably inserted into the slits 17 extending in the vertical direction of the vertical frame 2, and are rotatably connected in the R3 and R4 directions via 39.
The vertical movement of the main body 55 of the linearly movable member 50 is guided by the slit 17 and the two projections 138 inserted into the slit 17, and the main body 55 has an R3 centered on the axis 131.
And its rotation in the R4 direction is restricted. The flange 140 of each projection 138 prevents the projection 138 from coming out of the slit 17.

The mounting member 133 has a shaft pin 26 at one end.
, The other end is attached to the horizontal link member 132 via the shaft pin 29, and together with the rotation of the horizontal link member 132 in the R3 and R4 directions about the axis 131, the shaft 131 is also moved. The other end 135 of the coil spring 136 is rotated through the attachment member 133 attached to the uppermost horizontal link member 132 in this manner in the directions of R3 and R4. 132
It is connected to.

Note that the coil spring 136 is used as an elastic member.
In the case where a mainspring is used instead of using a spring, one end is connected to the uppermost horizontal link member 132 and the other end is connected to the main body 55, respectively, and is arranged around the shaft 131, for example, around the shaft member 139. .

The reverse forced rotation mechanism 137 includes a cam roller 171 rotatably provided on the uppermost horizontal link member 132 via the shaft pin 26, and an upward movement of the uppermost horizontal link member 132 above the opening 16. At this time, the guide cam surface 172 provided on the vertical frame 2 is
In this example, the guide cam surface 172 is formed of an outer surface of the projection 173 attached to the vertical frame 2.

When the opening 16 is closed by the blind 5 shown in FIG. 2, the tilt mechanism 10 raises the hanging portion 82 of the ball chain 62 to raise the ratchet gear 8 of the pawl 111.
5 is released and the belt 56 is fed out, the uppermost horizontal link member 132 is lowered, so that FIG.
As shown in FIG. 7, the contact between the cam roller 171 and the guide cam surface 172 is released, and the uppermost lateral link member 13 is turned by the elastic rotating force of the coil spring 136 in one direction R3.
12 is forcibly rotated in one direction R3, and conversely, in a state where the opening 16 is opened by the blind 5 shown in FIG.
Is wound, the guide abutment on the guide cam surface 172 based on the abutment of the cam roller 171 on the projection 173 causes the uppermost lateral force against the elastic rotating force of the coil spring 136 in one direction R3. Rotation of the link member 132 in the reverse direction R4 is caused, so that each of the slats 4 is moved from the state shown in FIG. 2 to the state shown in FIG. Or from the state shown in FIG. 11 to the state shown in FIG. 2 via the state shown in FIG. 9.

The above-described blind device 1 includes a ball chain 6
2 and the ratchet mechanism 71 are arranged on the window 161 of the building so as to face the room 160. In the blind device 1,
In the opening of the opening 16, the vertical link rows 27 and 30
Are folded, and each of the slats 4 is tightly overlapped (bundled) below the opening 16 as shown in FIG.

When closing the opening 16 in the blind device 1, first, the hanging portion 8 of the ball chain 62 is closed.
1, the pulley 63 is rotated in the R1 direction, and the pulley 54 is rotated via the reduction planetary gear units 68 and 69 and the rotating shaft 53.
And raises the uppermost horizontal link member 132. The rise of the horizontal link member 132 causes the vertical link row 27
And 30 are also extended from the upper end side, so that the horizontal link members 31 of the horizontal link row 32 are also lifted upward from above, so that the horizontal link members 31 including the horizontal link members 132
Each of the slats 4 fixed to the
6 is lifted in the closing direction. As shown in FIG. 10, when the cam roller 171 is located at a position where it does not abut on the protrusion 173, the vertical link rows 27 and 30 and the horizontal link rows 27 and 30 are held so that the slats 4 are held in a substantially horizontal tilt state. Link rows 32 and the like are formed.

Further, the vertical link rows 27 and 30 are extended by the belt 56 being wound around the pulley 54, and the blinds 5 are closed in the middle of the opening 16 of the blind 5, ie, the opening 1 in this example.
6, the cam roller 171 is located just before the complete closing.
3 and starts to be guided by the guide cam surface 172, the uppermost horizontal link member 132 is rotated in the R4 direction so that the vertical link row 30 is lifted more than the vertical link row 27. The slats 4 are rotated as shown in FIG. 9 and are sequentially set in a vertically inclined state. Further, by rotating the uppermost horizontal link member 132 in the R4 direction and lifting the vertical link row 30, the slats 4 are held in a substantially vertical tilt state as shown in FIG. Fully closed with blind 5 (completely closed)
Is done. Thereafter, the rotation of the pulley 54 due to the lowering of the ball chain 62 is stopped, and the closing operation of the opening 16 by the blind 5 is completed.

In the opening of the opening 16 by the blind 5, as shown in FIGS.
By lifting the hanging portion 82 of 2 to rotate the lever member 112 to release the engagement of the pawl 111 with the ratchet gear 85 and enable the pulley 63 to freely rotate in the R2 direction,
The pulley 54 is rotated in the reverse direction by the weight of the slats 4 and the like, and the vertical link rows 27 and 30 and the like are operated in this order as shown in FIGS. 2, 9, 11, and 12.

According to the above-described blind device 1, since the rotary drive device 57 is provided with the reduction planetary gear devices 68 and 69, the slat 4 does not require much force to move up. Since the rotation of the pulley 63 in the feeding direction of the belt 56 by the ratchet mechanism 71 can be released by lifting the ball chain 62, it can be performed smoothly.
In an emergency, it is possible to immediately bring the blind 5 into the open state.

The ratchet mechanism 7 of the blind device 1
According to 1, the rotation prohibition of the pulley 63 can be released only by rotating the lever member 112 elastically urged by the leaf spring 114 by lifting the ball chain 62, so that the blind 5 can be extremely easily and immediately mounted. The pulley 63 can be brought into an open state, and since the lever member 112 has the guide recess 115, the rotation inhibition of the pulley 63 can be released without error by lifting the ball chain 62.

Further, according to the blind device 1, the slats 4 are tilted by the tilt mechanism 10 so that the opening 16 can be completely closed and the opening 16 can be selectively closed. Since the tilt mechanism 10 is provided with the coil spring 136 that applies an elastic rotating force to the uppermost horizontal link member 132 in one direction R3, the uppermost horizontal link member 132 is driven by the reverse forced rotation mechanism 137. Is forcibly rotated in the reverse direction R4, and when the uppermost horizontal link member 132 is lowered to move the blind 5 to the opening position again, the uppermost horizontal link member 132
In one direction R by the elastic rotating force of the coil spring 136.
As a result, the slats 4 can be moved to the horizontal state at low cost and with high reliability.

[0056]

According to the present invention, Japanese Patent Application Laid-Open No.
Utilizing the advantages of the blind device as described in Japanese Patent Publication No. 9-1997, it is possible to immediately bring the opening state in an emergency, and it does not require much force for raising the slat. It is possible to provide a blind device that can be performed extremely smoothly.

Further, according to the present invention, it is possible to provide a blind device which can shift the slat to the horizontal state at low cost and with high reliability.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an example of a preferred embodiment of the present invention.

FIG. 2 is an explanatory longitudinal sectional view on one vertical frame side of the example shown in FIG. 1;

FIG. 3 is an explanatory diagram in one vertical frame of the example shown in FIG. 1;

FIG. 4 is a detailed explanatory view of the tilt mechanism shown in FIG. 3;

FIG. 5 is an explanatory cross-sectional view showing in detail a tilt mechanism in a vertical frame of the example shown in FIG. 1;

FIG. 6 is a partially enlarged plan view of the example shown in FIG. 1;

FIG. 7 is a perspective view of the rotary drive device of the example shown in FIG.

FIG. 8 is an exploded view of the rotation drive device shown in FIG. 7;

FIG. 9 is an operation explanatory diagram of the example shown in FIG. 1;

FIG. 10 is an operation explanatory diagram of the example shown in FIG. 1;

FIG. 11 is an operation explanatory diagram of the example shown in FIG. 1;

FIG. 12 is an operation explanatory diagram of the example shown in FIG. 1;

FIG. 13 is an operation explanatory diagram of the example shown in FIG. 1;

FIG. 14 is an operation explanatory diagram of the example shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blind device 2, 3 Vertical frame 4 Slat 5 Blind 7 Link mechanism 9 Link lifting mechanism 54 Pulley 56 Belt 57 Rotation drive unit 62 Ball chain 63 Pulley 68, 69 Reduction planetary gear unit 71 Ratchet mechanism

Claims (8)

[Claims] 1. A blind comprising a plurality of slats juxtaposed vertically between a pair of vertical frames, an extendable link mechanism arranged on each vertical frame, and a link having a lower end connected to the vertical frame. A link lifting mechanism that lifts the upper end of the mechanism and arranges the blind at the closing position, the link lifting mechanism includes a flexible elongated body having one end connected to the upper end of the link mechanism. The other end of the elongated body is connected, and the rotating body is provided with a rotating body that winds and elongates the elongated body by rotation, and a rotation driving device that rotates the rotating body. A string-shaped body, a pulley around which the string-shaped body is wound, and a reduction planetary gear device having output shafts on both side surfaces of the pulley, reducing the rotation of the pulley and outputting to each output shaft. Connected to each output shaft of this reduction planetary gear device, In addition to allowing the rotation shaft to which the rotating body is fixed and the pull-down string of the pulley in the winding direction of the elongated body to be manually pulled down, the rotation of the pulley blind in the unwinding direction of the elongated body due to its own weight. A blind device comprising: a ratchet mechanism for releasably prohibiting the rotation of the pulley in the direction in which the elongated body is extended by the ratchet mechanism. 2. The reduction planetary gear device includes a sun gear fixed to each side surface of a pulley, a planetary gear group including planetary gears meshing with the sun gear, and a planetary gear of the planetary gear group meshes with each other. The blind device according to claim 1, further comprising an internal gear having a predetermined internal gear, wherein the output shaft is fixed to a planetary frame that rotatably supports the planetary gears of each of the planetary gear groups. 3. A ratchet mechanism comprising: a ratchet gear fixed to a side surface of a pulley; a rotatable lever member having a pawl meshing with the ratchet gear; A biasing member for biasing the lever member, wherein the lever member is rotated in a direction in which the engagement of the pawl with the ratchet gear is released by lifting the string-shaped body. Item 3. The blind device according to item 1 or 2. 4. The rotary drive device includes a housing for housing the pulley, the lever member is rotatably supported by the housing, and the biasing member has one end fixed to the housing. The blind device according to claim 3, further comprising a leaf spring whose other end abuts on the lever member. 5. The blind device according to claim 3, wherein the lever member has a guide recess for guiding the string-shaped body to hang down. 6. The blind apparatus according to claim 1, wherein the string-like body is formed of an endless ball chain. 7. The apparatus according to claim 1, further comprising a tilt mechanism for tilting each of the slats, wherein an upper end of the link mechanism is lifted by a link lifting mechanism via the tilt mechanism. The blind device according to claim 1. 8. The link mechanism pivots between a first vertical link row, a second vertical link row provided in parallel with the first vertical link row, and first and second vertical link rows. A plurality of lateral link members freely connected to each other, an end of each slat is supported by each of the corresponding lateral link members, and the tilt mechanism is guided by the vertical frame so as to freely move. In addition, the rotation is regulated by a vertical frame, and on the other hand, the uppermost horizontal link member is rotatable, and on the other hand, a linearly movable member having a link lifting mechanism connected thereto, and one end is straightened. The other end of the movable member is connected to the uppermost horizontal link member, and an elastic member that applies an elastic revolving power in one direction to the uppermost horizontal link member; The uppermost horizontal rib against the elastic one-way rotation The blind device according to claim 7, further comprising a reverse forcible rotation mechanism for forcibly rotating the link member in a reverse direction.